chore(deps): bump docker/build-push-action from 5 to 6

Bumps [docker/build-push-action](https://github.com/docker/build-push-action) from 5 to 6.
- [Release notes](https://github.com/docker/build-push-action/releases)
- [Commits](docker/build-push-action@v5...v6)

---
updated-dependencies:
- dependency-name: docker/build-push-action
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/deploy.yml

@@ -86,7 +86,7 @@ jobs:
             type=semver,pattern={{major}}.{{minor}}
 
       - name: Build and push Docker image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: true

.github/workflows/release-50_publish-docker.yml

@@ -304,7 +304,7 @@ jobs:
 
       - name: Build and push
         id:   docker_build
-        uses: docker/build-push-action@5e99dacf67635c4f273e532b9266ddb609b3025a #  v6.9.0
+        uses: docker/build-push-action@9e436ba9f2d7bcd1d038c8e55d039d37896ddc5d #  v6.9.0
         with:
           push: true
           file: docker/dockerfiles/polkadot/polkadot_injected_debian.Dockerfile

.github/workflows/release.yml

@@ -85,7 +85,7 @@ jobs:
             latest
 
       - name: Build and push release image
-        uses: docker/build-push-action@v5
+        uses: docker/build-push-action@v6
         with:
           context: .
           push: true